@article{COCV_1997__2__343_0,
     author = {Lagnese, John E.},
     title = {Boundary controllability in problems of transmission for a class of second order hyperbolic systems},
     journal = {ESAIM: Control, Optimisation and Calculus of Variations},
     pages = {343--357},
     publisher = {EDP-Sciences},
     volume = {2},
     year = {1997},
     mrnumber = {1487483},
     zbl = {0899.93003},
     language = {en},
     url = {http://archive.numdam.org/item/COCV_1997__2__343_0/}
}